OF EXPERIMENT The purpose of this lab was to determine the magnitude of the uncertainties produced when making measurements using common lab equipment. II.APPARATUS AND MATERIALS NEEDED safety goggles distilled water (at 20°C) laboratory apron dropper laboratory balance 2 objects of unknown mass standard masses graduated cylinder‚ 10-mL graduated cylinder‚ 100-mL III.PROCEDURE Part A: Estimating the Uncertainty of a Balance 1.We put on lab aprons and goggles. Then‚ we used the
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The sizes of Paramecium September 17‚ 2008 Wednesday Lab I am writing about the testing of sizes on Paramecium caudatum and bursaria and how they differentiate from one another. In comparing the two specimen’s size I found that the Paramecium caudatum was larger in size than the bursaria. Paramecia are unicellular organisms and are usually less than 0.25mm in length and covered with minute hair-like projections called cilia. They are characterized by their cilia which are
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Kevina Smith Lab 1: Microscopy and the Metric System Part A: Microscopy Purpose The purpose of this experiment was to learn how to use a microscope correctly and perform wet mount slides accurately‚ thus becoming more familiar with the microscope. Hypothesis It would be hard to use the microscope without any kind of previous training and the parts of the microscope and their functions must be learned in order to use it properly. Materials & Methods Materials: 1. Filter
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Density of a given substance is independent of volume. Density never changes. I know that for a fact because during the “Density Does Not Change With Size” lab‚ we measured the length of rods given to us. For one I got 4.2cm‚ and when i weighed it on the scale I got 14.5g. Once I put the rod in the graduated cylinder I got 5.5cm squared. But when you divide your mass by volume‚ you will get your density. And for the density I got 2.6g/cm squared.Then for the other rod I got 6.7cm for length‚ 23.2g
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The amount of time we spend communicating is outstanding. There have been multiple studies to find the actual amount of our waking lives spent communicating‚ and the percentage of time we spend in each division of communication. The article‚ "Measurement of Time Spent Communicating‚" is the result of a communication study of employees of a research and development laboratory. The study was based on two techniques: direct observation‚ and questionnaires. How much time do people spend communicating
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Research: The word density means the degree of compactness of a substance. There is density in everything in your everyday life (matter.)The formula to find density is d=m/v.The density of solids and liquids is usually stated as g/cm3‚ while gases are usually stated as kg/m3. A real life example of density would be that ice floats on water because it is less dense than water‚ or it sinks because it is more dense than water. The only substance that breaks this rule is ice. Archimedes was
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List of Experiments : 1. To Study various Temperature Measuring Instruments and to Estimate their Response times. (a) Mercury – in glass thermometer (b) Thermocouple (c) Electrical resistance thermometer (d) Bio-metallic strip 2. To study the working of Bourdon Pressure Gauge and to check the calibration of the gauge in a deadweight pressure gauge calibration set up. 3. To study a Linear Variable Differential Transformer (LVDT) and use it in a simple experimental set up to measure a
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Techniques & Measurements Observations from Procedures Data Table 1 – Length measurements Object|Length (cm)|Length (mm)| CD|12|120| Key|5|50| Spoon|17|170| Fork|19|190| Metric Ruler|30|300| Data Table 2 – Temperature measurements Hot water from tap (44ºC )|Boiling water (70ºC)|Boiling water – 5 minutes (100ºC)| ]111.2 F|158 F|212 F| Cold water from tap (24ºC)|Ice water (5ºC)|Ice water – 5 minutes (0ºC)| 75.2 F|41 F|32 F| Data Table 3 – Mass measurements Object|Estimated
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The density of fractions 1‚ 2‚ and 3 are as follows: 1.49‚ 1.325‚ and 1.34 g/mL. These values areincorrect because the density should not have been over 1.0 g/mL. This is because the density of water is 1.0 g/mL‚ and the product should have had a mixture of ethanol and water‚ making the density lower. The measured weight of the vials and ethanol were incorrect due the scales.There are many factors that can cause a scale not to read the correct value. The first is the airflow underneath the weighing
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2014 Period 4 Lab #1: Density Determinations for Solutions Theory: The density of a sample of matter is very useful when trying to find the identity of an unknown substance. The units of density are quoted in (g/mL) for liquid samples of matter. For that reason if the volume is known of a liquid‚ determining its density is easily determined by weighing it accurately. Density can also be used as a tool for finding the concentration of solutions in some cases. The density is different in a
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